boileau



(Nov Model.) 2 Sheets-Sheet 1.

' E. BOILEAU.

GRATB. No. 525,805. Patented Sept. 11, 1894.

(No Model.) 2 sheets-sheet 2. E. BOILEAU.

. GRATE. No. 525,805. Patented Sept. 11, 1894.

UNITEE STATES PATENT OFFICE.

I ETIENNE BOILEAU, OF ST. LOUIS, MISSOURI, ASSIGNOR TO TI-IE IMPROVED ZIGZAG GRATE BAR COMPANY, OF SAME PLACE.

GRATE.

SPECIFICATION forming part of Letters Patent No. 525,805, dated September 11,1894.

Application led November 11, 1893. Serial No. 490,652. (No model.)

To @ZZ whom it may concern:

Be' it known that I, ETIENNE BOILEAU, of the clty of St.' Louis, inthe State of Missouri, have invented a certain new and useful Improvement in Grates, of which the following 1s a full, clear, and exact description, refer-y ence being had to the accompanying drawings, forming part of this specification.

My invention relates to certain improvements 1n grates, intended more particularly for u se in boiler furnaces; and my invention consists in features of novelty hereinafter fully described and pointed out in the claims.

Figure I is a top or plan view of my improved grate, with part of the grate projecting sections removed. Fig. II is a side view o f same. Fig. III is an enlarged, vertical section, taken on line III-III, Fig. II. Fig. IV 1s an enlarged, perspective view of one of the sections for covering and protecting the side bars of the grate. Fig. V is a vertical section, taken on line V-V, Fig. I. Fig. VI is a .detail view of the shaking mechanism. Flg. VII is a perspective view of one of the blocks or sections for covering and protecting the grate bars; and Fig. VIII is a similar vlew, showing a block with sixwings instead of four, as in Fig. VII.

1 represents the front and rear bars of the grate frame, and 2 represents the side bars.

3 represents the zigzag grate bars having Journals 4. fitting in the side bars 2.

5 represents blocks or sections having depending legs 6, fitting over the grate bars 3, at their angles. These blocks have wings 7 and 8. I have shown two wings in Fig. VII, and three in Fig. VIII. The .blocks or sectlons are so formed that each can fit or be used on either angle of the grate bars. This is accomplished in the first form shown in Fig. VII, by having the wings 7 longer than the wings 8. The blocks are put in place with the wings 7 on'the inside of the angle,

A as shown in Fig. I, which brings the short wings 8 on the outside ofthe angle. Thus any section may be used on any angle of either grate bar. In the second form, shown in Fig. VIII, where three wings are employed, there is a short inner wing 7a intermediate of the long wings 7 and a long outer wing 8a intermediate of the short wings 8. These blocks or sections hold the fuel away from the grate bars, protecting the latter, and as they become destroyed by the heat they can be slipped off and replaced by others. The outside configuration of the sections or blocks, is much the same as that shown in my Patent No. 485,527, dated November 1, 1892.

The inner faces of the front and rear bars 6o of the frame are provided with projections 10, to interlock with the wings of the adjacent blocks or sections 5. The side bars 2 are protected from the heat by means of blocks or sections 11, (see Figs. I, III, and 55 IV,) having downwardly projecting legs or extensions 12, which straddle the side bars, as shown. These sections hold the fuel from the side bars, and protect them from the heat, and they can be readily renewed as they 7o are worn out.

The grate bars have depending ears or projections 13, to which is pivoted a bar 14., (see Fig. V.) For the purpose of moving the bar 14, and shaking the grate, I employ a lever 15, connected to the bar 14., by a link 16. The lever is iitted in a head 17, pivoted at 18 to a bracket 19, secured to the front bar 1. The bracket 19 has a perforated, horizontal extension 20, and the head 17 has a perfo- 8o rated lug 21, (see Figs. V and VI.)

When it is desired to hold the grate bars in horizontal position, a pin 22 is passed through the perforations of the extension 20, and lug 21; and when it is desired to shake 85 the grate, the pin is removed, so that the head 17 turns on the pivot 18.

I claim as my invention- 1. In a grate, in combination with the zigzag grate bars, the blocks or sections 5, fitting 9o over or straddling the points of the angles having depending legs 6, short wings 8, and long wings 7; substantially as and for the purpose set forth.

2. In a grate, the combination of the zigzag grate-bars, and the blocks or sections 5, fitting over or straddling the points of the angies, having depending legs 6, inner wings 7 and outer wings 8; substantially as described.

ETIENNE BOILEAU.

In presence of- A. M. EBERsoLE, C. G. EDUAEDS. 

